diff options
author | Linus Torvalds <torvalds@ppc970.osdl.org> | 2005-04-16 18:20:36 -0400 |
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committer | Linus Torvalds <torvalds@ppc970.osdl.org> | 2005-04-16 18:20:36 -0400 |
commit | 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 (patch) | |
tree | 0bba044c4ce775e45a88a51686b5d9f90697ea9d /arch/v850/kernel/v850e_timer_d.c |
Linux-2.6.12-rc2v2.6.12-rc2
Initial git repository build. I'm not bothering with the full history,
even though we have it. We can create a separate "historical" git
archive of that later if we want to, and in the meantime it's about
3.2GB when imported into git - space that would just make the early
git days unnecessarily complicated, when we don't have a lot of good
infrastructure for it.
Let it rip!
Diffstat (limited to 'arch/v850/kernel/v850e_timer_d.c')
-rw-r--r-- | arch/v850/kernel/v850e_timer_d.c | 54 |
1 files changed, 54 insertions, 0 deletions
diff --git a/arch/v850/kernel/v850e_timer_d.c b/arch/v850/kernel/v850e_timer_d.c new file mode 100644 index 000000000000..d2a4ece2574c --- /dev/null +++ b/arch/v850/kernel/v850e_timer_d.c | |||
@@ -0,0 +1,54 @@ | |||
1 | /* | ||
2 | * include/asm-v850/v850e_timer_d.c -- `Timer D' component often used | ||
3 | * with V850E CPUs | ||
4 | * | ||
5 | * Copyright (C) 2001,02,03 NEC Electronics Corporation | ||
6 | * Copyright (C) 2001,02,03 Miles Bader <miles@gnu.org> | ||
7 | * | ||
8 | * This file is subject to the terms and conditions of the GNU General | ||
9 | * Public License. See the file COPYING in the main directory of this | ||
10 | * archive for more details. | ||
11 | * | ||
12 | * Written by Miles Bader <miles@gnu.org> | ||
13 | */ | ||
14 | |||
15 | #include <linux/kernel.h> | ||
16 | |||
17 | #include <asm/v850e_utils.h> | ||
18 | #include <asm/v850e_timer_d.h> | ||
19 | |||
20 | /* Start interval timer TIMER (0-3). The timer will issue the | ||
21 | corresponding INTCMD interrupt RATE times per second. | ||
22 | This function does not enable the interrupt. */ | ||
23 | void v850e_timer_d_configure (unsigned timer, unsigned rate) | ||
24 | { | ||
25 | unsigned divlog2, count; | ||
26 | |||
27 | /* Calculate params for timer. */ | ||
28 | if (! calc_counter_params ( | ||
29 | V850E_TIMER_D_BASE_FREQ, rate, | ||
30 | V850E_TIMER_D_TMCD_CS_MIN, V850E_TIMER_D_TMCD_CS_MAX, 16, | ||
31 | &divlog2, &count)) | ||
32 | printk (KERN_WARNING | ||
33 | "Cannot find interval timer %d setting suitable" | ||
34 | " for rate of %dHz.\n" | ||
35 | "Using rate of %dHz instead.\n", | ||
36 | timer, rate, | ||
37 | (V850E_TIMER_D_BASE_FREQ >> divlog2) >> 16); | ||
38 | |||
39 | /* Do the actual hardware timer initialization: */ | ||
40 | |||
41 | /* Enable timer. */ | ||
42 | V850E_TIMER_D_TMCD(timer) = V850E_TIMER_D_TMCD_CAE; | ||
43 | /* Set clock divider. */ | ||
44 | V850E_TIMER_D_TMCD(timer) | ||
45 | = V850E_TIMER_D_TMCD_CAE | ||
46 | | V850E_TIMER_D_TMCD_CS(divlog2); | ||
47 | /* Set timer compare register. */ | ||
48 | V850E_TIMER_D_CMD(timer) = count; | ||
49 | /* Start counting. */ | ||
50 | V850E_TIMER_D_TMCD(timer) | ||
51 | = V850E_TIMER_D_TMCD_CAE | ||
52 | | V850E_TIMER_D_TMCD_CS(divlog2) | ||
53 | | V850E_TIMER_D_TMCD_CE; | ||
54 | } | ||